Smoking-pipe and method of supporting combustion in same.



J. W. BOLTE.

SMOKING PIPE AND METHOD OF SUPPORTING COMBUSTION IN SAME. APPLICATION FILED- AUG. 12. 1916.

1,228,75?, Patented Apr. 24, 1917.

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JOHN WILLARD BOIIIE, OF OAK PARK, ILLINOIS.

SMOKING-PIPE AND METHOD OF SUPPORTING COMBUSTION IN SAME.

Specification of Letters Eatent.

Patented Apr. 2d, I917.

Application filed August 12, 1916. Serial No. 114,549.

To all whom it may concern:

Be it known that I, JOHN WILLARD Bowie, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Smoking-Pipes and Methods of Supporting Combustion in Same, of which the following is a specification.

My invention relates to certain new and useful improvements in a smoking pipe and method of supporting combustion in same.

Figure l is a longitudinal section through a pipe showing the same charged in the manner contemplated by my invention; and Fig. 2 is a perspective View of the prepared charge of tobacco.

It is well understood that the principal part of the undesirable products of combustion which pass off in the smoking of a pipe result from the incomplete combustion of tobacco. Complete combustion produces a very mild smoke and one which on chemical examination is found to be peculiarly free from injurious ingredients. 0n the other hand, if the combustion is incomplete, or if the tobacco is thoroughly preheated before it is burned, a process of more or less destructive distillation is-set up and an acrid smoke is produced. Chemical examination has shown that the injurious ingredients of tobacco smoke increase rapidly as this destructive distillation is permitted to occur.

In the ordinary pipe, charged with a previously prepared cartridge or otherwise, there is always a considerable amount of tobacco adhering to the walls or in close proximity thereto, which is only charred instead of being burned. This seems to be due not only to an insufficient supply of oxygen along the side walls, but to the cooling of the individual particles by contact with the pipe walls, and if the pipe Walls are hot enough to permit complete combustion of the particles immediately in contact with them they are necessarily hot enough to largely produce distillation before the particles are burned.

Efforts have also been made, and very energetic efforts recently, to bring into general F use a previously prepared cartridge of tobacco inclosed in a combustible wrapper. It is found that in practice such cartridges burn down through the center, leaving a considerable annulus of unconsumed partially distilled tobacco and the wrapper is in almost all cases charred, and this whether the wrapper be paper or tobacco, without undergoing anything like complete combustion, which gives rise to partial decomposition products of an unsatisfactory nature.

I have discovered that all the foregoing evil results can be overcome by the relatively simple expedient of providing the tobacco in the prepared cartridges, such as are now on the market, and then supporting the cartridge at the bottom and prevents the leakage of air therearound.

This pipe is smoked in precisely the same manner as is common but it operates in a distinctly diiferent way. In the first place, the entire cartridge, whether of tobacco alone or paper-wrapped tobacco, is consumed and burns uniformly to a complete ash. Furthermore, the cartridge itself is so protected, by the air around it, from extreme heat that the tobacco does not reach a distilling temperature until immediately before it is burned, so that the smoke is of a peculiarly mild and sweet character. The difference between the behavior of this pipe and pipes heretofore in use is best illustrated by the fact thatwhereas the ordinary pipe burns deepest in the center, the outer or upper end of the tobacco having a cupshaped depression in the center with the fire at the bottom, the present charge burns more rapidly along the sides, so that the outer end of the charge is liable to be conical.

I am aware that it has heretofore been proposed to build pipes with openings or slots cut in the side walls, but I find from experiment that the results here attained are absent with such constructions, apparently because the ribs between the openings exclude air from a considerable part of the charge, and, at the same time, cool the charge and thus interfere with complete combustion. The present arrangement is only one of many which I have tried, which secures the result of the complete combustionof the entire tobacco, leaving no circumferential particles to be destructively distilled. It has the further advantage that the pipe holds its fire particularly well and will remain lighted for a long time because my invention overcomes the chilling and fireretarding effect of close contact between the charge and the inner wall of the pipe-bowl. It will be obvious that the convenient way to smoke tobacco, according to the method herein described, is to provide it in cartridge form with a combustible wrapper. Loose tobacco cannot well be packed into a pipe of this kind and remain out of contact with its Walls, so that to secure the results here attained it is important that the charge be prepared in cartridge form and then inserted into the bowl.

I realize that considerable variation is possible in the details of the construction herein shown, and I do not intend to limit myself thereto, except as pointed out in the following claims, in which it is my intention to claim all the novelty inherent in the device as broadly as is permitted by the state of the art.

What I claim as new and desire to secure by Letters Patent is 1. A pipe having a bowl adapted to hold a prepared cartridge of tobacco of a diameter approximately equal to its length and having a combustible wrapper, the said bowl being so shaped as to grip the inner end of the cartridge whereby the body of the cartridge beyond its inner end is held out of contact with the wall of the bowl and is surrounded by an annular air space between it and the bowl, for the purpose set forth.

2. A pipe having a tapering bore forming a bowl gradually enlarging toward its outer end, and aninner or contracted end, .and adapted to hold a prepared cartridge of tobacco of a diameter approximately equal to its length, and in quantity substantially equivalent to a single pipe charge, and provided with a combustible wrapper, the said bowl being adapted to grip one end of the cartridge at the inner or contracted end of the bowl, wherebythe body of the cartridge beyond its inner end is held out of contact with the wall of the bowl and is surrounded by an annular air space between it and the bowl, for the purpose set forth.

JOHN WILLARD BOLTE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

